Mercury vapor rectifier



April 21, 1931. J. JONAS MERCURY VAPOR RECT IFIER Filed Feb. 2, 1929 I: AM...

. .Zi 4/4/4/ I E llllll /n yen/0r Ju/1 us Jonas B y fl/fokne Patented Apr. 21, 1931 UNITED STATES PATENT-OFFICE JULIUS JONAS, or BADEN', SWITZERLAND, VASSIGNOR TQ 'AKTIELIGESELLSCHAFT BROWN BovERI & cm, or BAiDEN, sWI'r R m, A JoInr-sroci: corrrenrior SWITZERLAND Application filed February 2, 1929, Serial No.

It has already been proposed to feed anodes of the same phase and working in parallel and belonging to one or more rectifiers over a transformer, common to them all,

which has several separate secondary winding parts co-ordinated to the separate anodes, which are evenly distributed over the primary winding. This ararngement has the object of forcing the anodes to take up equal amounts of current. If the anodes be furnished with grids or are guides, it may occur that the voltage drop betweenthe separate parallel connected anodes and the cathode will be large. Through the grids,

potential space charges are produced which block the passage of current to a greater or less extent and may even'entirely prevent it.

The grid potentials, however, are by no means a fixed quantity and it is found that, with very heavy current strengths, the grids of parallel connected anodes become charged very unequally, so that the originally equal distribution of current is considerably dis turbed. V

According to the present invention this disadvantage is overcome by the grids or are guides of parallel connected anodes being coupled electrically, that is to say, the said are guides or grids are conductively connected; Where the grids are mounted in the guides so as to be insulated from them, the grids and the guides can each be conductively connected up separately. Then there are a number of grids superposed over one another in stories, the grids of the same story may be conductively connected, or the grids of different stories may be connected cross-wise. Even with controlled grids it is preferable to connect the grids of parallel connected anodes conductively and to control them from a common voltage.

One embodiment of the invention is illustrated in the drawing in which reference character a generally indicates a rectifier of the metallic vapor type having a cathode b and a plurality of parallel operating anodes c 0 d d connected with a transformer indicated generally-at e. The transformer includes a primary winding f and a secondary winding divided into a plurality of por- MERCURY VAPOR RECTIFIER.

aaaoee, and in Germany February'23, 192s.

tions g g {/8 arranged in a uniform mannerover the primary winding f. 7c indicates the usual movable ignition anode and m, 11 indicates the usual excitation anodes. Theignition and excitation anode connections are not shown to avoid unnecessary complication in the drawing.

Each of the anodes c 0 (Z (Z2 is partially enclosed in an arc guide h. The are guides of parallel operating anodes are conductively connected and are provided with grids 21,, i likewise conductively connected. It will be seen fromthe drawing that the grids and the are guides of the several groups of parallel operating anodes are conductively connected but it is tobe understood that the grids may be insulated from the arcguides and that the grids may be separately conductively connected and that the are guides may be separately conductively connected.

Although the preferredembodiment 'of the present-invention only has been illustrated and described it will be apparent from the description and from the drawing that various changes may be made therein without departing from the spirit of the specification or from the scope of the appended claims.

What I claim is: 1 1. In means for obtaining an equal load division in an electric current rectifying system, a rectifier of the metallic Vapor type, a plurality of anodes within said rectifier, said anodes being arranged in groups for parallel operation, a cathode within said rectifier, are guides partially inclosing said anodes, grids arranged within said guides adjacent said anodes, the grids of parallel groups of said anodes being electrically connected, and a transformer including a primary winding and a secondary winding divided into a plurality of portions uniformly distributed over the primary winding.

2. In means for obtaining an equal load division in an electric current rectifying system, a rectifier of the metallic vapor type, a plurality of anodes within said rectifier, said anodes being arranged in groups for parallel operation, a cathode within said rectifier, are guides partially inclosing said anodes, the guides of parallel operating groups of said anodes being electrically connected, grids arranged Within said guides adjacent said anodes, the grids of parallel groups of said anodes being electrically connected, and a transformer including a primary Winding and a secondary Winding divided into a plurality of portions uniformly distributed over the primary winding.

3. In means for obtaining an equal load division in an electric current rectifying system, a rectifier of the metallic vapor type, a plurality of anodes Within said rectifier, said anodes being arranged in groups for parallel operation, a cathode Within said rectifier, are guides partially inclosing said anodes, grids arranged in insulated relation Within said guides adjacent said anodes, said guides and said grids of parallel operating groups of said anodes being electrically connected, and a transformer including a primary Winding and a secondary Winding divided into a plurality of portions.

4:. In means for obtaining an equal load division in an electric current rectifying system, a rectifier of the metallic vapor type, a plurality of anodes Within said rectifier, said anodes being arranged in groups for parallel operation, a cathode Within said rectifier, are guides partially inclosing said anodes, a plurality of grids arranged Within each of said guides, the grids in the same story in said guides being electrically connected, and a transformer including a primary winding and a secondary Winding divided into a plurality of portions.

In testimony whereof I have hereunto subscribed my name this 22nd day of January A. D. 1929.

JULIUS JONAS. 

